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Marginal-marine lithofacies, biofacies and ichnofacies, Chadakoin and Venango formations (Upper Devonian), Union City Dam, Erie County, Pennsylvania. Pages 26-32 in J. Harper, editor. 63rd Annual Field Conference of Pennsylvania Geologists: Geotectonic Environment of the Lake Erie Crustal Block. Field Conference of Pennsylvania Geologists, Harrisburg, PA.
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